What happens whenReign's Mary and Francis are taken hostage?On Thursday's episode, the castle is under siege, and Mary (Adelaide Kane) and Francis (Toby Regbo) must do whatever they can to save themselves. But before that, Catherine (Megan Follows) makes a ...

TV Guide

What happens when Reign's Mary and Francis are taken hostage?

On Thursday's episode, the castle is under siege, and Mary (Adelaide Kane) and Francis (Toby Regbo) must do whatever they can to save themselves. But before that, Catherine (Megan Follows) makes a surprising declaration by offering up Mary in a trade.

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Watch:

Reign airs on Thursdays at 9/8c on The CW.

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View original Reign Exclusive Sneak Peek: The Castle Is Under Siege at TVGuide.com